Loom



NOV. 17, 1931. MQBERG 1,832,496

LOOM

Filed Aug. 28, 1928 4 Sheets-$heat l INVE TOR M 0} BY flATTOR EY' Nov. 17, 1931. I. o. MOBERG LOOM Filed Aug. 28,. 1928 4 Sheets-Sheet 2 IN VEN TOR A? v A TTORN? Nov. 17, 1931.

|. o MOBERG 1,832,496

LOOM

Filed Aug. 28, 1928 4 Sheets-Sheet 3 2? IN VEN TOR Jzmua ATTOR VEY Nov. 17, 1931. 1. o. MOBERG 1,832,496

LOOM

Filed Aug. 28, 1928 4 Sheets-Sheet 4 INVENTOR QMQM I In, 28 I Patented Nov. 17, 1931 IVAR OSCAR MOBERG, OF LOWELL, MASSACHUSETTS LOOM Application filed August 28, 1928.

This invention relates to looms.

It is the general object of the invention to devise a loom which will produce automatically weaves of unusual. character, and certain weaves which have heretofore been produced commercially only by hand.

The nature and objects of the invention will be explained more fully in connection with the detailed description of the accomm panying drawings which illustrate a pre ferred embodiment of the invention, and the novel features will be particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a view partly in side elevation and partly in vertical section of a loom constructed in accordance with this invention, no attempt being made to show all the details of the loom;

Fig. 2 is a plan view of a takeup which is used in the loom shown in Fig. 1;

Fig. 3 is a plan view of a device for supportin a special warp thread which is used in the weaving operation;

5 Fig. 4 is a view similar to Fig. 1 but showing only a portion of the mechanism illustrated in Fig. 1, the parts being shown at a differentpoint in the cycle of operations;

Fig. 5 is a perspective view illustrating steps in the method of making a weave for which the machine is especially designed;

Figs. 6, 7, 8 and 9 are-diagrammatic views showing steps in the process of making said weave;

Figs. 10, 11 and 12 are side, front, and plan views, respectively, of the parts for handling the special warp'thread, some of the members illustrated in Fig. 11 being shown in section;

Figs. 13. 14 and 15 illustrate different weaves which can be made in the loom provided by this invention; and i Fig. 16 a side view of a special hook wh ch is sometimes used in the machine.

\Vhile the invention is applicable to the production of a variety of weaves, it is especially concerned with the problem of producing automatically weaves which have heretofore, so far as I am aware, been manufactured on a commercial scale only by hand.

Serial No. 302,477.

One of these weaves is illustrated in Fig. 13. The fabric there shown comprises a series of warp threads a interwoven with filling threads Z), the warp threads being omitted at a space 0 across which the filling threads are 5 floated. Certain of these filling threads are crossed over upon others and are held in this position by a special or locking warp d. This is sometimes referred to as an interverted cluster weave and is in the nature of a 1511- a ing leno effect.

Similar effects have been produced heretofore by machine weaving by crossing over the warp threads one upon the other in what is known as leno weaving. The objection to 5 such fabrics, however, is that they are used very largely as curtain fabrics and it is more desirable to have the interverted clusters extend vertically of the curtain instead of horizontally, as they must if the clusters are made with the warp threads, and if the selvage is to remain 011 the goods, as is also desired.

A loom for making the interverted clusters with the filling threads also has been proposed heretofore, but it has never been successful, so far as I have been able to learn, and so far as I am aware this fabric has been produced commercially only by hand. The usual method has been to weave a scrim or similar fabric, then to draw out the warp threads where the stripe or stripes of interverted clusters are to be made, and thereafter to draw in the special or locking warp thread with a needle. The thread is worked over certain groups of weft floats or filling threads which are exposed by the withdrawal of the warp threads, then back under half of each group, these operations being repeated for a desired length in the fabric. When the locking thread is pulled taut it reverses or interchanges the positions of the two halves of each group, thus producing substantially the effect illustrated in the upper part of Fig. 13. The manner in which the weft floats are reversed will be readily understood from an inspection of the lower part of Fig. 13. It will be observed that the locking warp (Z passes over the lower group of weft 0r filling floats Z) and under the similar group b". If the thread (Z is now pulled taut it obviously 1M of weft threads 5 and '0. crossing one group over the other and moving them into approxsimilar will reverse the posit'ons of the two groups imately the relationshi occu ied by groups as shown in the upper part 13. lVhile the machine illustrated drawings is capable of other uses, it is pa ticularly adapted to produce this weave.

Fig. 1 shows the invention applied to a plain loom of the common type. As shown, the loom comprises a frame 2. warp beam 3, whip roll 4-, lay 5, reed 6, breast bear-1 7, and takcup roll 8, all constructs arranged and operated in the usual manner. The loom also includes suitable hcddles 9 and a harness motion for manipulating the warp threads to produce the desired weave. This loom is designed to operate in the usual manner to weave a fabric.

In making the weave shown in Fig. 13 a special warp or locking thread (Z is neces as above explained, and this thread is sup ported in the loom on a spool 10 which is mountel in suitable brackets carried 3y the breast beam 7. one of these brackets being shown at 12, Fig". 1. Means is provided to apply tension to the spool so that it will not rotate too freely. and for this purpose one or both ends of the spool re engaged by a disk faced with leather. felt. or other yicldinn material. A disk so faced is shown at 13, this disk being pressed against the spool by a s ring 14. These parts are all mounted on the spindle or shaft 15 which supports the spool. the springbeing backed up by a collar 16 which is adiust-a )ly secured on the shaft. A collar 1'? fixed on said shaft bea s against the opposite end of the spool.

The thread (Z passes from over the spool 10 throu h a stat onary thread guide 1 and the ce through the eve 20 of a resilient talc u 21 to the eye 22. 5. of a thread guide 23 which s adj st-ably secured in a bracket- 24 mounted on the breast beam 7. From the eye 22 the thread pass-es to the fell of the goods. The eye. however. serves to locate or position the thread definitely at a point closely adiacent to the fell and thus facilitates its engao'ement by the parts that n12.- nulate it. Preferably res lient fingers in the form of leaf shrines are arranged to bear on t e fabric beintr woven at oppos te sides of and closely adjacent to th th ad Q'uidina eye 22.

the eve and the t l of the cloth and draw a biotin. or loop of th s thread through the reed 6. as shown in i: and and subsequently to spread the lens of this bia'ht. as illustrated in Fig; 6. The mechan sm provide for this purpose comprises two hooks 2 and 28. respectively, mounted one above the other. and bothv provided with loner shanks which extend ba-cl zrardly toward the rear of the loom. The hook-shaped portions of these members preferably are exactly alike and When they are together, as shown in Fig. 5, they form in effect, a single hook. The hook 27 is provided primarily to draw the loop or bigrht of locking thread (Z, while the chief function of the hook 28 is to spread this loop or bight. Referring to Fig. 4 it will be seen that the shank of the lower hook 27 is guided in b shines fixed in the opposite ends of a tube 30 which is supported in fixed position in the loom. The forward end of this tube is mounted in a bracket -31 which is secured rigidly to a stationary horizontal bar 32 that extends across the loom from one side frame piece thereof to the otaer. The rearward end of the tube is socured in a stationary horizontal bar 3 3 which likewise is fastened to the frame. This arrangement thus supports the lower book 27 for reciprocating movement longitudinally of the nachine and in an inclined. path.

The n'icchanism for reciprocating); the hooks includes a slide 3 l to which the book 27 is riu'idly secured. the slide being mounted in diametrically opposite slots cut longitudinally in the upper and lower walls of the tube. as shown in Flo; 4:. The upper book 28 is pivoteo to the slide 34 by a pin 35. lest shown in Fig. 12 and a coiled spring 5-36 encircling this pin acts on the hook to hold normally in its lowermost position where it rests against the hook 27. Both iooks must. therefore, move backward and forward in unison. if"; link 3'? connects the slide 34; with the upper end of a lever 38 which is fulcrumcd on the machine frantic at 40.

It will be clear that the reciprocating:

movements of the hooks must occur between ring; to Fic. t it will be that the lay.

sword 4:1 is equiopcd with a pin or lup; which is des gned. to engage at certain times with a hook 1-3 formed on a horizontal slide 4 1;. the rearward end of this slide having a stud 15 which is adiustable in a slot 4. 6 in an arm projecting; from a near sector 47. Springs 4-8 connected with the slide 14 normally hold the sector 4'? in the position shown in Fin. 4 with arm rest-int; against a. stop iVhen, however. the slide M: is moved toward the iloht. Fig. l, by the encasement of the pin with the hook the sector then operates through an intermed ate sear 51 to rotate another 52 mounted on shaft which carries a crank arm the shaft being siujmorted in the machine frame.

t. curred liar t connects this crank arm with the lever 38 previously referred to. Consequently. when the sector t'? is rocked by the slide 14- it operates throughjthe connections just described to swing the lever 38 toward the right, Fig. 4, and thus tomove the hooks 27 and 28 forward from the position shown in Fig. 4 to approximately that shown in Fig. 1. This movement occurs during the forward or beat-up stroke of the lay, and as the lay swings back the springs t8 return the hooks 27 and 28 to their former positions, as shown in Fig. 4.

It is desirable to produce this reciprocating movement of the hooks 27 and 28 at intervals only during the operation of the loom, say for example, after each twelve picks have been made. Consequently, a cam mechanism is provided to control the engagement of the pin 42 with the hook 48.

Referring to Figs. 1 and 1 it will be seen that a shaft 56 is mounted in the lower part of the frame and is driven through gear connections and an inclined shaft 57 from the cam shaft-58 of the loom. In this particular instance the gear ratio is made such that the shaft 56 revolves once While the loom makes twelve picks. Rotating with the shaft 56 is a. cam 6O having an abrupt rise 61. This cam operates a follower 6L, and an adjustable link 63 connects this follower with the slide 4-1 through a pin and slot connection 64. Normally the slide it remains in the position shown in Fig. 4, but immediately after each twelfth pick has been made, the rise 61 on This cam operates through the follower 62 and link 63 to raise the slide e' l sufficiently to move the hook 43 into the path of travel of the pin 42 on the lay sword. This results in moving the hooks 27 and 28 forward, as above described. The rise 61 immediately passes from under the follower so that the slide 44 drops before the lay makes its next beat-up.

As above indicated, the chief function of the upper hook 28 is to spread the loop or bight of locking thread (Z which is drawn by the hooks. This operation is performed by raising the upper hookafter it has moved to its rearmost position. As best shown in Figs. 10 and 11, the shank of the hook 28 lies in the upper forked end 65 of a rod 66, this rod being slotted as shown at 67 Fig. 11, to accommodate the lower hook 27. At its lower end this rod is pivoted to a cam follower 68 which carries a roll running on the surface of a cam 70 mounted on the shaft 56. When the loom has made a predetermined number. of picks, in this instance six, the cam 70 raises the rod 66, thus lifting the upper hook 28 into the position indicated in Fig. 6 and in dotted lines in Fig. 4, and it is held in this raised position while the. loom makes six more picks. During this movement the shank of the book 28 is steadied by the walls of a slot 71, Fig. 11, formed in the upper partof the bracket 31.

The takeup 21 previously mentioned consists of a spring arm, as shown in Figs. 1

and 2, supported on a. stationary horizontal rod 72 which is carried by a part of the harness stand. Part of the spring is coiled around the rod, as shown at 7 8, and the end is anchored in a collar 7 a which is secured to the rod. The arm 21 thus tends to raise the eye 20 and th=refore constantly exerts a tension to the thread (1.

It will now be understood that when the machine is in operation the hooks 27 and 28 will be advanced in unison at a certain point in the weaving cycle to substantially the position shown in Fig. 1, where they will engage the lockingthread d at a point between the fell of the goods and the thread guiding eye 22. They will then move backwardly to the rearward limit of their stroke, as shown in 4 and 5, thus drawing a bight or loop of the thread (5 through the reed and positioning this loop to form a part of the shed, or, in other words, in weaving relationship to the shuttle or other weft laying mechanism. At th s time the bight occupies approximately the position shown in Figs. 4 and 5, although the threads may be shown in slightly higher positions than they would actually occupy in practice in order better to illustrate them. The bight drawing operation just described has occurred between two successive picks. The loom next makes a predetermined number of picks, in this case six. Fig. 6 shows at 32 six such picks of filling laid in above the bight (Z of locking thread. As soon as these six picks have been laid in the hook 28 is raised, as above descr bed, thus lifting the upper leg of the loop cl into a position above the path of operation of the weft laying mechanism, so that the weft or filling subsequently inserted in the several picks is laid below the upper leg of the b ght. This is clearly shown in Fig. 6 where five picks of filling are indicated at 6 and the sixth pick 72 has just been shot through the shed and is about to be beaten up. At practically this instant the upper book 28 begins to dro and an instant later both hooks start forward toward the thread eye 22. The spring arm 21 takes up the slack practically as rapidly as the hooks move forward and when they arrive at about the positions shown in Fig. 7 they automatically disengage or release the thread d due to their peculiar shape, as clearly shown in Fig. 12. The hooks move somewhat further forward, as shown in Fig. 8, the takeup pulls out the slack in the thread cl, and the hooks next start upon their return movement, as shown in Fig. 9, engaging the thread d again immediately after this movement has begun. As they continue to move backwardly they pull the thread d taut, thus reversing the positions of the two groups of filling threads 6 and b". exactly as above described in connection with Fig. 13. The hooks continue to move backwardly until they reach the rean The machine ghus operates entirely automaticall to produce the interverted cluster effect, these clusters being made in. the weft or filling threads instead of in the warp as has been cnste iry heretofore in looms designed to produce this weave. In weaving curtain fabrics and similar goods it is essential as a prac :al matter, and for reasons explained above, to have the stripe of interverted clusters made in the weft or filling threads lamll than in the warp threads. Since there are no warp threads, other than the special or loc thread d, in the region where the intervc-r clusters are to be made, the reed wires can be removed at the point where the hooks Q? and 28 pass through it. This afil'irds ample com for the use of metal hooks of substantial size so that the use of weak or delicate parts which likely to become bent or broken is avoided. It has been determined in practice that it is entirely feasible to operate a looi'n equipped with mechanism such that illustrated at normal loom speeds.

if more than one stripe of interverted clusis to he made i the fabric, it is simply necessary to duplicate the mechanism for handling the locking thread (5 at he desired poins in the loom. These additional strips of ClllStiFl'S can be made at any desired points in the goods, and unique effects can be produced by mak ng them closely adjacent to each other. his. 1%: shows two adjoining stripes of clusters, while Fig. 15 shows three such rows of clusters lying side by side.

In some cases it is preferable to use a narrow band or ribbon instead of the locking thread Z. T he only changes required in the mechanism to enable it to handle a ribbon instead of a thread are simply minor changes in the shape of the thr ad guiding eyes 18, 20 and and in the hooks 2: and 2. Each of hooks should .ilat face as shown lltlVG El at f if 316, of a suitable width to engage and 1de the ribbon. It will be understood,

therefore, that the term locking thread in this s; ec'fication and in the claims is intended to include a ribbon.

T he mechanism is also capable of use in the 1)"??(lLlCtiOD of other weaves than those particularly described, as will be obvious to those skilled in this art.

While a preferred embodiment of the invention has been herein shown and described, will he understood that the invention may be embodied in. oth r forms without departing from the spirit or scope thereof.

Having thus described my invention, what I desire to claim new is:

1. in a loom having mechanism for support-mg and manipulating w.rp and weft threads to weave a fabric, the combination of supporting means for a locking warp thread, bight drawing mechanism including a device for engaging and releasing said locking thread, and means for operating said device to move it forward and backward through the reed and to cause it to draw a bight of said locking thread toward the back of the loom and position it in operative relationship to the weft laying means.

2. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for a locking warp thread, bight drawing mechanism including a device for engaging and releasing said locking thread and means for operating said device to move it forward and backward through the reed and to cause it to draw a bight of said locking thread toward the back of the loom and position it in operative relationship to the weft laying means, and mechanism for moving the locking thread so positioned above or below the path of the weft laying mechanism as desired without interrupting the weaving operations.

In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the eombination of supporting means for a locking warp thread, bight drawing mechanism including a device for engaging and releasing said locking thread and means for operating said device to move it forward and backward through the reed and to cause it to draw a bight of said locking thread toward the back of the loom and position it in operative relationship to the weft laying means, and means operating through said bight drawing mechanism to carry one leg only of said hight above or below tne path of the weft laying mechanism as desired without interrupting the weaving operations.

l. In a loom having mechanism for surporting and manipulating warp and weft threads to weave a frabric, the combination of means for supporting a locking warp thread including a guide for said locking thread for positioning the thread closely adjacent to the fell of the fabric eing woven, and means movable forward and backward for automatically engaging said locking thread between said guide and he fell of the goods and drawing a bight of said thread through the reed and toward the back of the loom.

5. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of means for supporting locking warp thread, and means movable forward and backward for automatically drawing a bi ght of said locking thread from a point a dja cent to the fell of the goods hrough. reed toward the 'ear of the loom and positioning said bight in weaving relationship to the weft laying mechanism. 7 V

6. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of means for supporting a locking warp thread, bight drawing means including a rigid device and means for operating it to move it through the reed and to cause it forward and backward to draw a bight of said locking thread backwardiy toward the rear of the loom, means for positioning said locking thread for said bi ght drawing operation, and mechanism operating through said means to spreachthe legs of said bight to position one of them in a different operative relationship to the weft laying mechanism when a predetermined number of picks have been made.

7. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for a locking warp thread, bight drawing mechanism including a hook and means for moving said hook through the reed into position to engage said locking thread and draw a bight thereof rearwardly through the reed and to position one leg of said bight in weaving relationship to the weft laying mechanism, and means for spreading the legs of said bight to move one leg thereof into a different operating level with reference to the weftlaying mechanism, whereby the weft will be laid on opposite sides of said leg, said weft drawing and bight spreading mechanisms operating automatically in timed relationship to the weaving operations and without interrupting said weaving operations.

8. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for a lockingwarp thread, bight drawing mechanism including a device for engaging and releasing said locking thread and means for operating said device to move it through the reed and to cause it to draw a bight of said locking thread toward the back of the loom and position it in operative relationship to the weft laying means, and connections for operating said hight drawing mechanism from the lay.

9. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of means for supporting a locking warp thread, a device for engaging and releasing said locking thread, mechanism for operating said device to engage said locking thread and draw a bight thereof from a point adjacent to the fell of the goods through the reed and to position one leg of said bight in weaving relationship to the weft laying mechanism to cause said mechanism to lay weft on one side thereof, and means for changing the relationship between said locking thread and said weft laying mechanism to cause the laying of the weft on the opposite side of said thread, the operating mechanism for said device being arranged to cause it to release said locking thread when a predetermined number of picks have been laid on each side of it and ubsequentiy to-engage the thread and draw another bight for the repetition of said opera- 13101155.

10. In a loom having mechanism for supporting and inanipuiating warp and weft threads to weave a fabric, the combination of for supporting a locking warp thread, a hook for engaging said locking thread, means for moving said hook through the reed to cause it to draw a bight of said locking thread 'backwardly toward. the rear of the loom, supporting and guiding means for said hook, means for spreading the legs of said bight to move one leg thereof into a different operating level with reference to the weft iaying mechanism whereby weft threads will be laid on opposite sides of said leg, the operating mechanism for said hook being arranged to cause it to release said locking thread when a predetermined number of picks of weft have been associated with a bight thereof, and a takeup mechanism co operating with said locking thread to take up slack in it.

11. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for a locking thread including a guide for positioning the locking thread closely'adjacent to the fell of the fabric being woven, a hook movable through the reed to engage said locking thread be tween said guide and the fell of the goods, supporting and guiding means for said hook, mechanism for operating said hook to reciprocate it through the reed toward and from said threadengaging position whereby it is operative to draw a bight of said locking thread through the reed and toward the rear of the loom, means for moving one legof said bight into a different operating level with reference to the weft laying mechanism when a predetermined number of picks have been made, and a take-up mechanism for operating on said locking thread to take up siack. V

12.. in a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for a locking thread including a guide for positioning the locking thread closely adjacent to the fell of the fabric being woven, a hook movable through the reed to engage said locking thread between said guide and the fell of the goods, supporting and guiding means for said hook, mechanism for operating said hook to reciprocate it through the reed toward and from said thread engaging position, whereby it is operative to draw a bight of said locking thread through the reed and toward the rear of the lOOl-Il a member for engaging a leg of the bight or locking thread so drawn, and il'iGClliHliSHl for operating said member to cause it to spread the legs of said bight to move one of them into a different operating level with reference to the weft laying mechanism, whereby the weft will be laid on either side of said leg of the bight as desired.

13. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for a locking thread including a guide for positioning the locking thread closely adjacent to the fell of the fabric bein woven, a hook movable through the reed to engage said locking thread between said guide and the fell of the goods, supporting and guiding means for said hook, mechanism for operating said hook to reciprocate it through the reed toward and from said thread engaging position once only during a plurality of reciprocations of the lay, whereby it is operative at intervals to draw a bight of said locking thread through the reed and toward the rear of the loom, and means for .ie'ving one leg of said bight into different operating levels with reference to the weft laying mechanism at predetermined intervals in the weaving operations.

1 in a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for a locking thread including guide for positioning the locking thread closely adjacent to the fell of the fabric being woven, a hook movable through the reed to engage said locking thread between said guide and the fell of the goods, supporting and guiding means for said hook, mechanism for operating said hook to reciprocate it through the reed toward and from said thread engaging position once only during a plurality of reciprocations of the lay, whereby it is operative at intervals to draw a bight of said locking thread through the reed and toward the rear of the loom, a member mounted for vertical movement and arranged to engage a leg of the bight of thread held by said hook, and cam mechanism for moving said member to cause it to carry said log into a different operating level with reference to the weft laying mechanism when a predetermined number of picks have been made.

in a loom having mechanism for supporting and manipulating warp and weft thr ads to weave a fabric, the combination of suppo ting means for a locking thread including a guide for positioning the locking thread closely adjacent to the fell of the fabric being woven, two hooks movable in unison through the reed to engage said lo king thread substantially simultaneously between said guide and the fell of the goods, means for supporting and guiding said hooks, mechanism for operating said hooks to reciprocate them simultaneously through the reed toward and from their thread engaging positions, whereby they are operative to draw a bight of said locking thread through the reed and toward the rear of the loom, and mechanism for moving one of said hooks vertically to spread the legs of said bight and carry one leg into a different operating level with reference to the weft laying mechanism when a predetermined number of picks have been made.

16. In a loom having mechanism for supporting and manipulating warp and weft threads to weave a fabric, the combination of supporting means for locking warp thread, bight drawing mechanism including a devi e for engaging and releasing said locking threads, means for operating said device to move it forward and backward through the reed and to cause it to draw a bight of said locking thread toward the back of the loom and position it in such a location that weft threads will be laid both above and below one leg of said bight, and means for subsequently straightening said locking threads to cross the weft threads so laid over each other.

17. In a loom having mechanism for supporting and manipulating warp threads and weft laying means cooperating therewith to weave a fabric, of supporting means for a locking warp thread, a bight drawing mechanism including a devire for engaging said locking warp thread and drawing a bight of said locking thread toward the back of the loom to position it in such a location that weft threads will be laid both above and below one leg of said bight, and means for subsequently straightening said locking warp threads to cross the weft threads so laid above and below it.

IVAR OSCAR MOBERG.

CERTIFICATE OF CORRECTIQN.

Patent No. 1,832,496. Granted November 17, 1931, to

IVAR OSCAR MOBERG.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, lines 9 and 10, claim 6, strike out thev words "forward and backward and insert the same after "it" second occurrence in line 8, of same claim; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 22nd day of December, A. D. 1931.

M. J. Moore,

(Seal) Acting Commissioner of Patents. 

